What's going on in the job market?
https://finance.yahoo.com/economy/article/unemployment-dipped-but-more-people-left-the-workforce-whats-going-on-in-the-job-market-185543008.html
The unemployment rate is sort of like the Dow-Jones Index - a frequently cited number that just as often tells you little of use, but is still a headline number for historical reasons.
Labor force participation is a much more useful number.